Wille, Alvaro. “A New Species of Stingless Bee <i>Trigona (Plebeia)</i> From Costa Rica, With Descriptions of Its General Behavior and Cluster-Type Nest”. Revista de Biología Tropical 15, no. 2 (December 1, 1967): 299–313. Accessed August 16, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/28471.